The discovery of Kepler 22b made waves in the scientific and astronomical communities last week, but NASA is not one to rest on its laurels. This week, they have made history again, discovering not one but two planets the size of our precious Earth orbiting similar stars in other systems. Both are in what scientists refer to as the “habitable zone” which is the distance from their sun that is most likely to allow life to develop and evolve. Meet Kepler 20-e and Kepler 20-f, our sister planets just 950 light-years away from Earth.

UK Blue Sphere: UK Blue Sphere: Scientists at Bournemouth University have announced they have soveld the puzzle. There is no need to prepare a welcome for extra-terrestrials. The blue balls are almost certainly sodium polyacrylate or waterlock, an﻿ absorbent polymer used in nappies and by florists and gardeners as a way of keeping soil moist. Miracle Grow moisture-retaining dirt has the same stuff sold in USA. Was this answer helpful?